Results 191 to 200 of about 12,653 (220)

The Weaponization of ESG Infrastructures and the Future of Green Finance

Global Policy, EarlyView.
ABSTRACT The trillion‐dollar green finance industry faces growing pushbacks from a range of actors. While criticisms vary—from portraying ESG as part of a “woke” agenda to highlighting risks of greenwashing—we now see mass departures from climate–finance initiatives, with asset managers coming under fire from regulators over ESG policies and activist ...
Annika Stenström
wiley   +1 more source

Existentially closed models of some class of differential-difference fields (Model theoretic aspects of the notion of independence and dimension)

Existentially closed models of some class of differential-difference fields (Model theoretic aspects of the notion of independence and dimension)
openaire  

Existentially closed and maximal models in positive logic

Algebra and Logic, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
A. Kungozhin
exaly   +4 more sources

Countable infinite existentially closed models of universally axiomatizable theories

Siberian Advances in Mathematics, 2016
Summary: We obtain a new criterion for a model of a universally axiomatizable theory to be existentially closed. The notion of a maximal existential type is used in the proof and for investigating properties of countable infinite existentially closed structures.
A. T. Nurtazin
exaly   +4 more sources

Existentially closed models via constructible sets: There are 2^ℵ0 existentially closed pairwise non elementarily equivalent existentially closed ordered groups

Journal of Symbolic Logic, 1996
AbstractWe prove that there are 2χ0 pairwise non elementarily equivalent existentially closed ordered groups, which solve the main open problem in this area (cf. [3, 10]).A simple direct proof is given of the weaker fact that the theory of ordered groups has no model companion; the case of the ordered division rings over a field k is also investigated ...
Anatole Khélif
openaire   +2 more sources

Existentially Closed Models of Basic Number Theory

, 1977
This paper is concerned with a subtheory B of (first order) peano number theory P which is strong enough to contain many non-trivial number theoretic facts. We call this theory B basic number theory. Our aim is to give a complete description of the spectrum of (countable) models of B. Of course we will not achieve this aim here, but the results we give
Harold Simmons
openaire   +2 more sources

Existential Morphisms and Existentially Closed Models of Logical Categories

Mathematical Logic Quarterly, 1981
Ioana Petrescu
openaire   +3 more sources

Existentially closed modules: Types and prime models

, 1980
Élisabeth Bouscaren
openaire   +2 more sources